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Green Stuff brings the dinosaurs and other long-vanished animals back to life… as models

Antrodemus part of a series of dinosaur models sculpted in 1:48 scale using Green Stuff

“Art and model making are really the only way those of us living in the present day might see dinosaurs and other long vanished animals as they were.” Those are the words of Andrew Treaner-Harvey, whose love of extinct creatures and desire to understand them has led to him creating a series of dinosaur models using Green Stuff.


Andrew is an artist and model maker from Cornwall and talking to him is rather fascinating. He spends hours sculpting and creating purely for his own enjoyment.

His model making does not really extend beyond that, although he does discuss with a friend down his local pub the most important matters of the day… namely, Airfix and how best to convert an existing figure into Tom Baker’s version of Doctor Who.

Today though, we are talking dinosaurs: “The animals are for nothing other than my own pleasure. I just love dinosaurs and any other long vanished animals,” says Andrew. “Apart from watching the birds in one’s garden, art and model making are really the only way we can see them as they once were.”

And our knowledge of what these magnificent creatures were is changing all the time. Something which model making and art can reflect better than most mediums; dinosaur models can be adapted and modified for accurate representations which update our impressions.

Take the famous Tyrannosaurus rex, for example. When you picture T. rex in your mind, do you imagine it with feathers? Because you should. T. rex is part of the tyrannosaur family and in 2004, another member was discovered in China.

Dilong paradoxus was the first tyrannosaur to be found with fossilised feathers. Subsequent studies and further discoveries over the past two decades mean scientists now believe that all tyrannosaurs came with feathers, including the T. rex.

A one-year-old T. rex would have been the size of a goose and covered in feathers. Not many of this apex predator made it beyond that age; they were small enough to be eaten by other carnivorous dinosaurs.

Those who did survive grew quickly, piling on 100 pounds a month or more whilst losing some of its plumage. But even by the time T. rex reached its 20s and was fully grown into a 9 ton beast, it would still have patches of feathers.

How about Velociraptor? Most people think of ‘raptors as a human-sized, lighting quick predator, thanks mainly to the way it is portrayed in the Jurassic Park franchise and the torment it causes Sam Neill and his Hollywood co-stars in the 1993 original film.

In reality, Velociraptor was barely half a metre high. Like Tyrannosaurus, it was also covered in feathers – something not discovered until 2007, 14 years after Steven Spielberg’s Oscar-winning epic brought Velociraptor into the hearts and nightmares of modern-day humanity.

Whereas Spielberg cannot go back and change the original Jurassic Park movie to reflect what we now know about T. rex and Velociraptor, Andrew is constantly creating new models so that his dinosaurs are as accurate as possible up to current knowledge.

He studies closely Palaeontological papers, looks at pictures of fossils and reads up on a great deal of anatomical detail to get the animals just right. This desire for accuracy extends to his 1/48th scale human figures, including the aforementioned Tom Baker and other incarnations of Doctor Who.

“I do not really like the ‘heroic’ scales, with all the disproportionate heads and hands,” says Andrew. “I think it was John Blance of Citadel Miniatures who once wrote that an ordinary person shrunk down to the size of an inch would be a rather boring thing to look at.”

“Therefore, it was up to the artist or model maker to make things more exaggerated to add interest. He was right, but as I am only trying to please myself, I feel there is more of a challenge in getting things right anatomically. For me, one simply must get things right, and keep challenging one’s skills.”

“An Allosaurus I recently sculpted should be bang on with current knowledge. I worked the face out from a science paper that was published a couple of years ago. I still have it somewhere. Somebody did a superb illustration to show how the animal would have looked, and I have tried to be faithful to that.”

Andrew has even received help from experts in the field with his models, sketches and paintings: “I have a big oil painting of Stegosaurus awaiting its colours at present. I work in the old way which oils were first used for; black, burnt umber and white under painting, then colours in thin layers.”

“I contacted a palaeontologist some time ago and sent her some of my sketches of Stegosaurus. She said I was almost right, except the neck needed to be longer, but they hadn’t known that until recent new findings. That was encouraging.”

Through his dinosaur models, Andrew is producing a visual record of how our knowledge regarding the animals grows and develops. His most recent Stegosaurus might (nearly) have the seal of approval from an expert, but older efforts reflect the image we once had of one of the more well-known dinosaurs.

“Some of the model Stegosaurus I have made are of the ‘old school’ tail dragger type. These are based on the all the old paintings and illustrations of people like Zdenek Burain. I love his work.”

“They have never found a tail drag mark from Stegosaurus among the fossil footprints that cover the world, but as you know, that is how the scientists of yore thought the animals looked.”

The way we think each dinosaur looked might change with surprising frequency, but Andrew’s technique for making his models always remains the same. It combines a familiar approach of Green Stuff and wire armature with some special tricks he has developed to capture the uniqueness of these creatures who ruled the world for 165 million years.

“The bodies of my dinosaur models are all made with wire armature and Green Stuff. For Deinonychus, I fully sculpted it as a skeleton first, then muscles and so on until the feathered skin. Most of the work is lost under all that skin though.”

“There is a lot of sculpting involved. Diplodocus even in 1/48th scale is 22 inches long. It is made from Super Sculpey Polymer Clay, Milliput and Green Stuff, over a wire armature and a lump of foil to bulk out the fat belly.”

“I have made my own small tools for rendering scaly skin using flattened lumps of either Green Stuff or Milliput and peppering the surface with small holes. When pushed into soft modelling putty, they create a satisfying scaly texture. Diplodocus had poppy seeds in its skin too.”

Once sculpted, Andrew then paints his dinosaur models to stunning effect… but only when he has a suitable set of brushes. “We have very few art shops in my area of West Cornwall and I am very fussy about good quality brushes!”

“The one art shop we do have is a good 25 miles away and I rarely ever get the chance to go there. It is only ever open for a short space of time, on very few days as the the proprietor is getting on in years.”

Where Andrew is willing to deviate from his dedication to accuracy is by occasionally introducing people alongside his dinosaur models. Humans as we know them today were yet to walk the Earth when the dinosaurs were wiped out by an asteroid striking the Yucatan Peninsula in what is now Mexico some 66 million years ago.

But Andrew will occasionally include 1:48 scale people he has sculpted alongside his dinosaurs for two reasons. The first is to give some idea of the sheer size of these animals. Whilst everyone knows Diplodocus was big, it is only when it is totally dwarfing a woman that you realise just how big.

The other reason for including people harks back to Andrew’s love of old movies starring dinosaurs, long before Spielberg defined what the modern-day blockbuster should look like.

“Inspired by the old monster films of cave men and dinosaurs having fights, I have often thought of warriors riding them and battling with each other and so on. The make for fine fantasy models and good artwork”

These warriors come from Andrew’s modular figures, made again from Green Stuff and wire armature. He sculpts both males and females and modifies the base as and when required, building characters to suit the project at hand.

“Doing the figures this way means I can spin off as many different characters as I wish. I just modify them, glue them together and dress them in whatever is required.”

“You can use the figures for any period in time or space, if you know what I mean.” Ah yes, another Doctor Who reference. “I once saw an illustration of a Silurian riding a dinosaur. I thought, one day, I could take that to another level.”

Watch this space.

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Epoxy modelling putty – Your guide to model making & sculpting putties

Selecting the right epoxy modelling putty from the large number available can be a difficult task with each model making putty having its own unique properties

Judging by our inbox, the world of epoxy modelling putty can be confusing. One of the most frequent enquiries we get is to explain the difference between the various model making and sculpting putties available and which one is most suitable for a specific application.

Green Stuff, Magic Sculp, Geomfix, Milliput… there are a lot of options. The rather unhelpful answer is that most of the time, choosing an epoxy modelling putty comes down to personal preference. Some will find the stickiness of Green Stuff easier to work with; others the smooth texture of Magic Sculp.

It is rather like pizza toppings. Everyone has their favourite and there really is no wrong or right answer…. even pineapple is acceptable. Before we end up talking too much about pizza and I end up going to Dominos for lunch, let us get back to the subject at hand – model making putty.

Whilst a lot depends on which putty you get along with best, there are some differences between epoxy modelling putties that you can take into consideration when deciding on your sculpting medium of choice.

Welcome to the SylCreate guide to selecting the right model making putty.

Green Stuff

Green Stuff is often the preferred epoxy putty of wargamers. It is flexible and gives a fine cut, making it ideal for adding intricate details to goblins, orcs, and other fantasy creatures.

For highly-detailed Warhammer, Dungeons & Dragons and other fantasy work, it is perfect. Some of the world’s leading model makers such as The Goblin Master Kevin Adams and Alan and Michael Perry of Perry Miniatures are Green Stuff devotees.



When working with Green Stuff, it is noticeable just how sticky the putty is. It can take some getting used to. This stickiness allows the cured putty to retain a degree of flexibility, enabling the user to bend it into shape without it breaking.

These elastic properties make Green Stuff popular with scale model enthusiasts and professionals as well as wargamers. Whilst scale model makers will use a firmer epoxy modelling putty like Magic Sculp for initial sculpting or conversions, more detailed items can be made with Green Stuff, bent and then glued onto the other cured putty.

Award-winning AFV modeller David Parker deploys this technique for adding detailed insignia and supporting accessories such as belts and hair to his tank crew.

Green Stuff comes in two formats; a reel and a stick. The reel is pre-formatted with the resin and the hardener combined. To use, you simply cut off the amount of putty required and mix it together until it turns green.

One downside of the reel format is it does not allow the user much control over the mixing ratio of Green Stuff. That is not the case with the stick, where the resin and the hardener are separate portions.

The recommended mix of Green Stuff is 50-50, but in more specialist applications there are advantages to be had from adjusting these quantities. Professional model makers will sometimes go as far as to use four or five parts yellow to one part of blue hardener.

Less hardener means a longer curing time than the standard of 90 minutes to 1 hour and a much lighter consistency of putty, allowing for more time to work with a material capable of holding even more detail.

For more guidance on using Green Stuff, then Kneadatite have written a handy guide on their website with everything you could ever want to know about using the putty.

Magic Sculp

Magic Sculp has a finer texture and a softer consistency than Green Stuff, making it easier to sculpt in larger projects.

It is much more clay-like and once cured, it can be sanded, carved, painted… you could even attack it with a grinding tool and it would not break or lose shape.



Whereas Green Stuff is used mainly by wargamers, Magic Sculp has multiple uses. It is popular in the scale model world for easily converting existing models, gap filling and sculpting new models and accessories.

Sculptors like it because of how easy it is to carve and the smooth finish it provides. They use it to repair and restore existing pieces as well as for creating new pieces.

In one of our favourite applications, it has even been combined with brick dust to create a coloured putty which seamlessly repaired a large hole in a brick wall.

Another reason Magic Sculp is popular for larger projects is its work time. At room temperature, it will not cure for two to three hours, offering much longer for model makers and sculptors to carve and shape the putty in larger projects.

Geomfix Original A+B Epoxy Modelling Putty

The best way to describe Geomfix Original A+B is as a cross between Green Stuff and Magic Sculp.

It can hold the finest of details like Green Stuff, allowing it to be used for intricate work. At the same time, it has a tough surface similar to Magic Sculp for building up bulk models and use in restoration work.



Geomfix’s secret is that it is ceramic filled. This allows it to set harder than most other epoxy modelling putties, giving it a ceramic feel which makes it perfect for restoring china and other materials.

The list of users of Geomfix Original is pretty extensive. Scale model makers, wargamers, arts and crafts enthusiasts, china restorers, doll repairers and jewellery designers all use it.

Away from our world of creativity, a super-strength, industrial version of the epoxy putty known as Sylmasta AB is used in maintenance and repair tasks.

If you are unsure whether Green Stuff or Magic Sculp are the epoxy modelling putty for you, then Geomfix is a versatile, happy-medium between the two.

It has a two hour work time which can be accelerated using heat, is available in bulk quantities for the biggest projects and comes in three colours – standard white, jet black and silver grey.

Geomfix Coloured Epoxy Modelling Putty

The colour options do not end there. Geomfix is also available in a further 25 colours which match Swarovski crystals.

Originally, Geomfix Coloured was manufactured as a jewellery epoxy putty but the concept quickly grew into other areas including antique restoration, large design projects, and creating seasonal items sich as Christmas crafts and decorations.



Geomfix Coloured is made-to-order on-site by SylCreate. As well as the standard 25 colours, our technicians can customise an epoxy modelling putty to a specific colour.

When Donald Trump was in the White House, we were even asked by one customer to produce a Trump-coloured epoxy putty. The result was surprisingly accurate – although we never did ask what the putty was for…

Milliput

Millliput have been manufacturing epoxy modelling putties from their base in Wales since 1968, earning a deserved reputation as one of the best in the business.

All Milliput putties follow the same format – they come in two parts, 56.7gm of resin and 56.7gm of hardener. Mix the two together and off you go, whether your application is repairing a cracked toilet, fixing a leaking radiator, woodturning, or sculpting coal for a model railway.

There are six colours of Milliput available. Standard sets to a yellow-grey with the others doing exactly what they say on the tin: Silver-Grey, Superfine White, Black, Terracotta and Turquoise Blue.

Because Milliput is as much of a repair putty as it is a model making epoxy, it is not great at holding the finer details which most scale model or wargamers require when sculpting.

Where Milliput is good is in price – it is by far the cheapest epoxy putty around, making it a popular choice when it comes to packing out the body of large-scale models.

Surprisingly few model makers seem to know this, but you can mix modelling putties together to combine their properties. It is here where Milliput shows its worth.

For larger model making projects in which greater quantities of putty are required, Milliput can provide bulk in a more cost-effective manner.

Mix it with Green Stuff and you create a putty which can be used to build up a model and offers a degree of Green Stuff’s flexibility and ability to hold intricate details.

You can find out more about the benefits of mixing modelling putties in this article we wrote on the subject.

Superfast Wood Stick

Last but by no means least on our list is Superfast Wood Stick, an epoxy putty specially formulated for wood repair and restoration.

The putty is wood-filled and cures to the colour of wood, allowing it to be used as a damage filler. It repairs fences, furniture and wooden sculptures and the cured putty even floats.

Since bringing it into the SylCreate range, we have seen customers start to use it to carve brand new wood-like ornaments and creations.

Superfast Epoxy Putties do not stop with wood, either. There are specialist putties for the repair of other materials including concrete, which we have recommended to several customers carrying out restoration on stone materials.

If you have any projects completed using our modelling putties which you would like to share with us, then please email photos and a write-up to sales@sylmasta.com.